Rock-pulverizing machine.



J. B. ROSSMAN.

BOOK PULVEHIZING MACHINE. APPLICATION FILED ULY 2a, 1908.

Patented 801113.27, 1910.

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J. B. ROSSMAN.

ROCK PULVERIZING MACHINE.

APPLICATION FILED JULY 2B, 1908.

921,311 Patented Sept. 27, 1910 2 8HEETS-SHEET 2.

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JOHN B. ROSSMAN, OF ST. PAUL, MINNESOTA.

ROCK-PULVERIZING MACHINE.

Specification of Letters Patent. Patgnted Sgpt, 27, 19}[ Application filed July 28, 1908.

Serial No. 445,743.

To all whom it may concern:

Be it known that I, J OHN B. ROSSMAN, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain. new and useful Improvements in Roek-Pulverizing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in rock pulverizing machines and the purpose is to provide a machine which will produce a product as fine as desired, and at the same time, necessitate the use of a smaller amount of power than required by machines now employed for grinding the same amount of ore.

One of the objects of the invention is to provide a machine, which engages, cracks, and disintegrates the rock along the lines of least resistance, such result being attained by the peculiar and novel disposition and relative motion of the aw-faces.

A further object is to construct a machine for the purpose set forth, wherein means are provided for obtaining a coarse or a fine product, by a ready adjustment of the jawfaces.

With these several objects in view, as well as others which will appear more clearly hereinafter, my invention, in its preferred embodiment, is illustrated by the form of construction fully described in the following specification, pointed out in the claims hereto annexed, and disclosed in the accompanying drawings, in which,

Figure 1 is a top plan view of a machine embodying my invention. Fig. 2 is a side elevation thereof. Fig. 3 is a detail view showing the movable and stationary frames, and the means employed for adjusting the jaws to desired position, and Fig. 4 is a detail view in vertical section through the frame showing a jaw and attaching means therefor.

Referring more particularly to the drawings, in which like reference characters refer to corresponding parts in the several. views, A designates the main frame of the machine, which is provided with the journal boxes a, a, in which is mounted the shaft a a being a pulley on the shaft for communicating power thereto. Carried by the shaft a at its ends are suitable eccentrics which are connected to the bar a by the connectingrods a B is a movable frame, positioned to recip rocate in a central opening of the stationary main frame A, and having an opening B for a purpose to be explained hereinafter. Bars a a are attached to the frame B in any suitable manner. Connecting the bars a a and secured thereto in any convenient manner are the rods (4 a which are adapted to slide in the guideboxes a The frames A and B are provided with a series of semicircular recesses in which are secured the correspondingly shaped jaws I), which are attached to the frames A and B in any suitable manner to permit of their adjustment, so that the meeting plane of the jaws may be disposed at various angles.

The particular form of adjustment which I have here disclosed includes a curved groove or incut portion formed in the aws and designated by a. A bolt a is employed to hold the aw in position, the head of the bolts a on the inner and movable frame B being positioned in the slot B beforementioned. Suitable nuts o engage the bolts (4 in the grooves (4 Thus, by simply loosening the nuts and turning the jaws, the grinding faces may be changed to assume any desired angle, relative to the line of motion of the movable frame.

It is obvious that other constructions may be employed for obtaining the adjustment just described.

If, from trial, the precise angle is known, at which the proper degree of fineness is obtained in the product, the adjustable jaws may be omitted, and instead, the jaw-faces may be secured directly to the frames, the frames being formed to provide support for the jaw-faces at the desired angle.

Secured to the jaws Z) are jaw-faces 5 between which the rock or other mate ial to be disintegrated is crushed. 6 are cutaway portions in the frames adjacent the semicircular recesses, to permit the reciprocation of the movable frame, carrying the movable jaws, the length of said cut-away portions being at least as great as the length of movement of which the movable frame is capable. This is shown clearly in Fig. 3.

It will be apparent, that when motion is imparted to shaft (i through the pulley a, a longitudinal back and forth movement is given to connecting-rods a and likewise the frame B which carries one set of jaws.

These jaws are thus moved toward and away from the corresponding jaw-faces on the stationary frame. It must be noted that this motion of the jaws is not directly to and from one another, but is in the nature of a double movement, since they have a sliding action at the same time that they approach one another, such action being due to the fact that the plane of the aw-faces is at an angle to the direction of movement of the movable frame. The extent of this angle regulates the fineness or coarseness of the finished product. This is effected by simply loosening and turning the jaws b in their respective frames as already fully described.

The double motion just pointed out is a. very important feature of my invention, and it is due to this that the rock is broken on the lines of least resistance. The ore is held firmly against the stationary jaw by the motion of the faces toward each other, which prevents it from sliding on either the stationary or movable jaw. l/Vhile the ore is held against sliding movement, the lengthwise movement of the movable jaw engages one side of the rock causing it to split and fall to pieces without the application of a comparatively great amount of power.

As shown in Fig. 2, there is a second set of aw-faces, positioned below the upper set of jaw-faces, and screens interposed between, to carry off the material which is ground sufficiently by the upper set, leaving the coarser material to pass into the lower set of jaw-faces.

c designates the lower shaft, correspond ing to the upper shaft (4 and deriving its motion therefrom through the gears 0 c, and 0 respectively.

A designates the upper, and A the lower frame. Positioned beneath the upper set of jaws are two baffle boards 0 which catch the material and direct it on to the screens 0 The rock which is sufficiently ground passes through the screens and on to the battle boards a which carry it into a central opening of the machine, whence it passes out by a trough 0. The coarser material falls from the screens, below, to the bafiie boards 0 and is, by them, directed into the lower set of grinding jaws. From the lower set of grinding jaws the rock passes through a set of baflle boards and screens similar to those disposed beneath the upper set, the finely ground particles passing into the trough a, and the coarser material into the trough c, from which it is transmitted to another and similar machine for further disintegration. The screens may be connected to some moving part of the machine, whereby they are given a vibratory motion, to assist in separating the material, although this is not absolutely essential to my invention.

It is to be understood that I have dis closed my invention in only one form, which constitutes a preferred embodiment, but various changes and modifications may be made without departing from the spirit of my invention, and as such, are to be included within the scope of my improvement.

What I desire to secure by Letters-Patent, and claim, is

1. In a machine for disintegrating rock, the combination with a stationary frame, of a movable frame, and cooperating jaws carried by said frames, the meeting plane of said jaws being at any angle to the line of movement of said movable frame, and means for adjusting the relative angularity of said jaws.

2. In a machine for disintegrating rock, the combination with a stationary frame, of a movable frame, semi-circular recesses in said frames, correspondingly shaped cooperating jaws positioned in said recesses, the meeting plane of said jaws being arranged at an angle to the line of movement of said movable jaw, and cut-away portions in the frames adjacent said semi-circular recesses.

3. In a machine for disintegrating rock, the combination with a stationary frame, of a movable frame, semi-circular recesses in said frames, correspondingly shaped cooperating jaws adjustably positioned in said recesses, the meeting plane of said jaws being arranged at an angle to the line of movement of said movable jaw, and cutaway portions in the frames adjacent said semi-circular recesses.

4. In a machine for disintegrating rock, the combination with a stationary frame, of a movable frame, semi-circular recesses in said frames, correspondingly shaped cooperating jaws positioned in the recesses, grooves in the jaws, bolts positioned in said grooves for securing the jaws to the frame, the meeting plane of the jaws being at an angle to the line of movement of the aforesaid movable jaw, and cut-away port-ions in the frame adjacent said semi-circular recesses.

In testimony whereof, I affix my signature, in the presence of two subscribing witnesses.

JOHN B. ROSSMAN. Witnesses A. G. ROSSMAN, E. I. MURPHY. 

